Dude..... You still not adjust the mana issue of aura skill :? I may have some opinion you can look for
You can just increase more traits having increase mana regen, or reduce the mana cost of aura skill, or make it just delete character max mana by 2 or 3 when using, or give one of stats can increase mana regen ( like focus increase mana regen, or just make a new stats just specific on mana pool and regen) and maybe just make a new energy bar only for aura skill like Poe 2, or just delete the mana the skill using and limit how much aura skill player can use when low level and slowly open more aura skill slot when they got to higher level ( or just some requirements player need to do to unlock using the 2nd, 3rd, 4th aura skill )
Not offense, i just really like the aura skill but current system kinda lame for me to use or maybe me being greedy want to use a holy of 7,8 aura skill all the time :)))